The Gear,helical, cataloged under National Stock Number 3020-00-388-0105, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Hatch & Kirk, Inc.. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-388-0105 |
| Primary Part Number | 3226333 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Hatch & Kirk, Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.000 INCHES BOTH ENDS IN |
| Helix Angle | 45.0000 DEGREES |
| Hub Nominal Diameter | 3.249 INCHES BOTH ENDS IN |
| Teeth Quantity | 36 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.500 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.250 INCHES SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 89.0 ROCKWELL B MINIMUM AND 93.0 ROCKWELL B MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-890,CLASS B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.4853 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 48 BOTH ENDS |
| Nominal Outside Diameter | 8.817 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 1.9505 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 2.750 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3226333 | Hatch & Kirk, Inc. (USA) |
| Reference | Meaning |
|---|---|
| K3226333 | 3/9 Design control — primary reference Korody-Colyer Corp a Cr Industries Co |
| 3226333 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
NSN 3020-00-388-0105 is a Gear,helical, manufactured by Hatch & Kirk, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-388-0105 has 1 manufacturer part number on file: 3226333 (Hatch & Kirk, Inc.).
Key specifications for 3226333: Bore Nominal Diameter: 2.000 INCHES BOTH ENDS IN; Helix Angle: 45.0000 DEGREES; Hub Nominal Diameter: 3.249 INCHES BOTH ENDS IN; Teeth Quantity: 36. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.